*{
    margin: 0;
    padding: 0;
}
.body{
    position: relative;
}
.main{
    position: absolute;
    left:50%;
    top: 50%;
    width: 400px;
    height: 200px;
    background: gray;
    margin-top: -100px;
    margin-left: -200px;
    overflow: hidden;
}
.radius1,.radius2{
    width: 100px;
    height: 100px;
    background: #fc0;
    border-radius: 50px;
}
.radius1{
    position: absolute;
    left: -50px;
    top: -50px;
}
.radius2{
    position: absolute;
    right: -50px;
    bottom: -50px;
}
